Photonics Dictionary

eye-safe laser operation

Wavelengths between 400 and 1400 nm (VIS to NIR) are focused onto the retina by the cornea. Because the retina is sensitive to light, these wavelengths can be damaging even at low energies. It is the energy of the laser, in addition to the wavelength, that determines how dangerous it is to the eye. The risk of eye injury can be reduced by both protective eyewear and by laser designs that prevent exposure to the laser light.
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